Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Financial Instruments

The fair value measurements of the Company’s financial instruments as of December 31, 2018 are summarized in the table below: 

			Significant
	Quoted Prices in		Other		Significant
	Active Markets for		Observable		Unobservable		Balance at
	Identical Assets		Inputs		Inputs		December 31,
	(Level 1)		(Level 2)		(Level 3)		2018
	(in thousands)
Assets:
Money market funds	$	6,998	$	—	$	—	$	6,998

The fair value measurements of the Company’s financial instruments at December 31, 2017 are summarized in the table below: 

			Significant
	Quoted Prices in		Other		Significant
	Active Markets for		Observable		Unobservable		Balance at
	Identical Assets		Inputs		Inputs		December 31,
	(Level 1)		(Level 2)		(Level 3)		2017
	(in thousands)
Assets:
Money market funds	$	20,046	$	—	$	—	$	20,046